Refactor TR20 protocol decoder

1 files changed, 49 insertions, 82 deletions

diff --git a/src/org/traccar/protocol/Tr20ProtocolDecoder.java b/src/org/traccar/protocol/Tr20ProtocolDecoder.java
index 069757820..fac0f8ee9 100644
--- a/src/org/traccar/protocol/Tr20ProtocolDecoder.java
+++ b/src/org/traccar/protocol/Tr20ProtocolDecoder.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012 Anton Tananaev (anton.tananaev@gmail.com)
+ * Copyright 2012 - 2015 Anton Tananaev (anton.tananaev@gmail.com)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,12 +16,12 @@
 package org.traccar.protocol;
 
 import java.net.SocketAddress;
-import java.util.Calendar;
-import java.util.TimeZone;
-import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 import org.jboss.netty.channel.Channel;
 import org.traccar.BaseProtocolDecoder;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
 import org.traccar.helper.UnitsConverter;
 import org.traccar.model.Position;
 
@@ -31,98 +31,65 @@ public class Tr20ProtocolDecoder extends BaseProtocolDecoder {
         super(protocol);
     }
 
-    private static final Pattern PATTERN_PING = Pattern.compile(
-            "%%[^,]+,(\\d+)");
-
-    private static final Pattern PATTERN_DATA = Pattern.compile(
-            "%%" +
-            "([^,]+)," +                   // Id
-            "([AL])," +                    // Validity
-            "(\\d{2})(\\d{2})(\\d{2})" +   // Date (YYMMDD)
-            "(\\d{2})(\\d{2})(\\d{2})," +  // Time (HHMMSS)
-            "([NS])" +
-            "(\\d{2})(\\d{2}\\.\\d+)" +    // Latitude (DDMM.MMMM)
-            "([EW])" +
-            "(\\d{3})(\\d{2}\\.\\d+)," +   // Longitude (DDDMM.MMMM)
-            "(\\d+)," +                    // Speed
-            "(\\d+)," +                    // Course
-            ".*");
+    private static final Pattern PATTERN_PING = new PatternBuilder()
+            .text("%%")
+            .expression("[^,]+,")
+            .number("(d+)")
+            .compile();
+
+    private static final Pattern PATTERN_DATA = new PatternBuilder()
+            .text("%%")
+            .expression("([^,]+),")              // id
+            .expression("([AL]),")               // validity
+            .number("(dd)(dd)(dd)")              // date (yymmdd)
+            .number("(dd)(dd)(dd),")             // time
+            .expression("([NS])")
+            .number("(dd)(dd.d+)")               // latitude
+            .expression("([EW])")
+            .number("(ddd)(dd.d+),")             // longitude
+            .number("(d+),")                     // speed
+            .number("(d+),")                     // course
+            .any()
+            .compile();
 
     @Override
     protected Object decode(
-            Channel channel, SocketAddress remoteAddress, Object msg)
-            throws Exception {
-
-        String sentence = (String) msg;
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
 
-        // Keep alive message
-        Matcher parser = PATTERN_PING.matcher(sentence);
+        Parser parser = new Parser(PATTERN_PING, (String) msg);
         if (parser.matches()) {
-
-            // Send response
             if (channel != null) {
-                channel.write("&&" + parser.group(1) + "\r\n");
-            }
-        } else {
-
-            // Data message parse
-            parser = PATTERN_DATA.matcher(sentence);
-
-            // Unknown message
-            if (!parser.matches()) {
-                return null;
+                channel.write("&&" + parser.next() + "\r\n"); // keep-alive response
             }
+            return null;
+        }
 
-            // Create new position
-            Position position = new Position();
-            position.setProtocol(getProtocolName());
-
-            Integer index = 1;
-
-            // Get device by id
-            if (!identify(parser.group(index++), channel)) {
-                return null;
-            }
-            position.setDeviceId(getDeviceId());
-
-            // Validity
-            position.setValid(parser.group(index++).compareTo("A") == 0);
-
-            // Time
-            Calendar time = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
-            time.clear();
-            time.set(Calendar.YEAR, 2000 + Integer.parseInt(parser.group(index++)));
-            time.set(Calendar.MONTH, Integer.parseInt(parser.group(index++)) - 1);
-            time.set(Calendar.DAY_OF_MONTH, Integer.parseInt(parser.group(index++)));
-            time.set(Calendar.HOUR_OF_DAY, Integer.parseInt(parser.group(index++)));
-            time.set(Calendar.MINUTE, Integer.parseInt(parser.group(index++)));
-            time.set(Calendar.SECOND, Integer.parseInt(parser.group(index++)));
-            position.setTime(time.getTime());
+        parser = new Parser(PATTERN_DATA, (String) msg);
+        if (!parser.matches()) {
+            return null;
+        }
 
-            // Latitude
-            int hemisphere = 1;
-            if (parser.group(index++).compareTo("S") == 0) hemisphere = -1;
-            Double latitude = Double.parseDouble(parser.group(index++));
-            latitude += Double.parseDouble(parser.group(index++)) / 60;
-            position.setLatitude(latitude * hemisphere);
+        Position position = new Position();
+        position.setProtocol(getProtocolName());
 
-            // Longitude
-            hemisphere = 1;
-            if (parser.group(index++).compareTo("W") == 0) hemisphere = -1;
-            Double longitude = Double.parseDouble(parser.group(index++));
-            longitude += Double.parseDouble(parser.group(index++)) / 60;
-            position.setLongitude(longitude * hemisphere);
+        if (!identify(parser.next(), channel)) {
+            return null;
+        }
+        position.setDeviceId(getDeviceId());
 
-            // Speed
-            position.setSpeed(UnitsConverter.knotsFromKph(Double.parseDouble(parser.group(index++))));
+        position.setValid(parser.next().equals("A"));
 
-            // Course
-            position.setCourse(Double.parseDouble(parser.group(index++)));
+        DateBuilder dateBuilder = new DateBuilder()
+                .setDate(parser.nextInt(), parser.nextInt(), parser.nextInt())
+                .setTime(parser.nextInt(), parser.nextInt(), parser.nextInt());
+        position.setTime(dateBuilder.getDate());
 
-            return position;
-        }
+        position.setLatitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG_MIN));
+        position.setLongitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG_MIN));
+        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble()));
+        position.setCourse(parser.nextDouble());
 
-        return null;
+        return position;
     }
 
 }